公开(公告)号：US10520022B2

公开(公告)日：2019-12-31

申请号：US16316779

申请日：2017-08-07

申请人： NIPPON BEARING CO., LTD.

发明人： Toru Yamazaki ,  Tomohiko Kikuchi ,  Yusuke Ueki ,  Masaki Kawamura ,  Taku Koyama

IPC分类号： F16C29/06

摘要： Provided is a linear motion device having higher rigidity, higher load resistance, and superior guiding precision. In this linear motion device, a linearly moving element 2 that moves linearly relative to a rail element 1 is provided, load paths 4 through which rolling elements 3 move are provided between the rail element 1 and the linearly moving element 2, and endless rolling element circulation paths are formed in which the load paths 4 are made to communicate via return paths 5 with no-load paths 6, wherein the rolling elements 3 are cylinders of which the length is at least three times the diameter, the rolling elements 3 are configured so as to circulate through the endless rolling element circulation paths while being rotatably held by rolling element holders 10 configured by spacers 8 provided between adjacent rolling elements 3 and belt-shaped linking elements 9 that link spacers 8 together at both ends, the no-load paths 6 are formed by placing no-load path-constituting members 12 in linear holes 11 formed in the linearly moving element 2, and the no-load path-constituting members 12 are configured such that the end surfaces of the rolling elements 3 are opened on the outward sides and the linking elements 9 of the rolling element holders 10 are exposed.